Valve tester and grinder.



B. HEWITT.

B @MMM Patented Apr. 10, 1917.

stradine rnrnivr onirica.,

BERT HEWITI, OF SAN RAFAEL, CALIFORNIA.

VALVE TESTER AND GRINDER.

-ipplication filed April 5, 1916.

To all whom t may concern:

Be it known that I, Bear Hnwrr'r, a citizen of the United States, residing at San Rafael, in the county of li/larin and State of California, have invented new and useful Improvements in Valve Testers and Grinders, of which the following is a specification.

This invention relates to valve testers and grinders; and has for its object to simplify and improve the operation of testing and grinding valves, and to provide a novel and inexpensive device for accomplishing this operation.

In carrying out this object I employ a pneumatic device consisting of a chamber to be fitted tightly over the valve and valve seat, to which chamber air under pressure is supplied for the purpose of determining the lit of the valve from the amount of resistance offered by the same, when manipulated, and means in connection with the chamber for turning the valve in its seat to grind the same.

One form which my invention may assume is exemplified in the following description and illustrated in the accompanying drawing, in which- Figure 1 shows a vertical, central, sectional view of a device embodying my invention, applied to a valve.

Fig. t2 shows a plan view of the device.

Fig. 3 shows a vertical, central, sectional view of the device used as a grinder.

In the drawing I have shown a portion of an engine cylinder 10, seated in which is a puppet valve 11, of any suitable form. My tester embodies a chamber 12 open at one end and having a packing 13 at its open end to seat upon the cylinder surroundin the valve. The closed end of the chamber as a convexity 1l, on which is fitted a yoke strap 15, the ends of which strap are slotted to receive stud bolts 16, the latter adapted to be secured to the engine cylinder, whereby the chamber may be tightly clamped on the cylinder to form an air-tight compartment over the valve. The chamber has an inlet valve 17, communicating with which is a source of fluid supply such as air under pressure, whereby the chamber may be filled with compressed air.

The fit of the valve in its seat can be determined by the amount of leakage past the same and the preferred manner of determining the leakage is to manipulate the valve, by hand or otherwise, up and down in its Specification of Letters Patent.

Patented Apr. 110, 191'?.

Serial No. 89,224.

seat. rIhe resistance offered to this manipulation will indicate clearly the closeness of fit of the valve in its seat.

For grinding the valve the head of the same is provided with openings 18 to receive projecting' ends 19 of a swinging bail 20, when the chamber is inverted, and thus by turning said chamber the valve is moved in its seat to effect a grinding. The bail 20 thus folds against the end of the chamber to permit seating of the yoke strap 15 and will readily swing to position for entering the slots 18 to turn the valve.

Many changes in the construction and arrangement of the several parts described herein may be employed without departing from the spirit of my invention as disclosed in the appended claims.

By having the strap 15 slotted, the bolts 16 may be positioned at variable points, such points being determined by the location of the openings in the cylinder wall, which are designed to receive the usual fastening bolts for the overlying valve casing.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. In combination, a chamber open at one end adapted to be fitted over the valve, a clamping bar on the closed end of said chamber, said clamping bar having slotted ends, bolts received in said slots, for attachment to the walls of the valve seat, whereby to secure the chamberI in air-tight engagement with said walls, and means for supplying air under pressure to said chamber to determine the lit of the valve upon its seat.

2. In combination, a chamber open at one end adapted to be fitted over a valve, a member hinged on the closed end of said chamber, a clamping bar removably seated on said closed end for attachment to the walls of the valve seat, whereby to secure the chamber in air-tight engagement with said walls, means for supplying air under pressure to said chamber to determine the lit of the valve upon its seat, said valve having means to receive the hinged member when the chamber is inverted, whereby the valve may be turned in its seat for grinding.

3. The method'of testing lifting valves which consists in establishing an air-tight chamber around the head of the valve, supplying air to said chamber, and then moving the valve from its seat into the pressure chamber, and determining from the amount tending to seat said valve, and determining from the amount of leakage occurring past vthe Valve the closeness of fit of the same.

5. ln combination, a pneumatic tester comprising an air Chamber detaehably litted over the Valve,y means for supplying air under pressure to said chamber for determining the it 01": the valve, and co-acting means on said Chamber and said valve for turning and grinding the valve and its seat.

6. A pneumatic tester for lifting valves comprising an air chamber detachably fitted over said Valve, and means for supplying air under pressure to said Chamber, said valve being adapted to be manipulated Within its seat, whereby to determine the fit thereof from the amount of resistance 0ffered to the manipulation.

7. A pneumatic tester for lifting valves, Comprising an air Chamber adapted to be detaohably itted over the valve, means for securing the Chamber in air-tight engagement with the walls of said seat, and means for supplying air under pressurel to said chamber, whereby to determine the closeness of fit of the Valve on its seat'from the amount of leakage past the same.

In testimony whereof l have hereunto set .my hand in the presence of tWoV subscribing Witnesses.

I BERT HEWITT. Witnesses A. B. DEWING, A. N. BoYEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

